We have examined 167 patients who had a hemiarthroplasty for three- and four-part fractures and fracture-dislocations of the head of the humerus in a multicentre study involving 12 Austrian hospitals. All patients were followed for more than a year. Anatomical healing of the tuberosity significantly influenced the outcome as measured by the Constant score and subjective patient satisfaction. With regard to pain, the outcome was generally satisfactory but only 41.9% of patients were able to flex the shoulder above 90 degrees. The age of the patient and the type of prosthesis significantly influenced the healing of the tuberosity, but bone grafting did not. Achievement of healing of the tuberosity was inferior in institutions at which less than 15 hemiarthroplasties had been performed (Mann-Witney U test, p = 0.0001).

In the period from 2/98 up to 6/99, fractures of the proximal femur of 70 patients (phi 79.2 a), were treated with a proximal femur nail (PFN((R))). The aim of this retrospective analysis was to evaluate intra- and perioperative complications. The reports of the operation and the anaesthesia documentation sheets have been worked out, all X-rays have been measured, and evaluated along exactly defined parameters. Problems or complications were found in 18 cases (25,7%). In 7 cases (10,0%) these problems could be solved during operation. The "Z-effect" seen in 5 cases (7,1%) and the "cut-out" of the sliding-hip-screw in 6 cases (8,6%) were the most frequent complications. The main reason was a bad primary reposition in varus with a CCD-Angle less than 125 degrees.

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